Cosmetic brush



FIG. 1 is a perspective view of a cosmetic brush showing my new design;

FIG. 2 is a front elevation view thereof, the rear elevation view beinga mirror image of the front elevation view;

FIG. 3 is a top plan view thereof, the bottom plan view being identicalto the top plan view;

FIG. 4 is a left side elevation view thereof; and,

FIG. 5 is a right side elevation view thereof.

CLAIM The ornamental design for a cosmetic brush, as shown anddescribed.